Colos frequently forbid the use of small UPS's for a variety of reasons.
In my experience they always need to be connected to the EPO switch, which poses it's own risks. Plus try to find a UPS with that feature for reasonable prices.
APC says it's available on the SUA2200RM2U and SUA3000RM2U, and lists it as optional for the APC SUA1500RM2U. I would consider all of these to be reasonably priced.
Which leads me to this question: What questions do you ask any potential colocation provider to determine if they are built out to your needs?
See if they'll guarantee diverse power as part of the contract. :-) It's disappointing to find a colo that feeds you your primary and redundant power off the same UPS. ... JG -- Joe Greco - sol.net Network Services - Milwaukee, WI - http://www.sol.net "We call it the 'one bite at the apple' rule. Give me one chance [and] then I won't contact you again." - Direct Marketing Ass'n position on e-mail spam(CNN) With 24 million small businesses in the US alone, that's way too many apples.